Ask This Old House — Episode 22: Heating & Cooling System Controller; Re-Grout Tile Floor

You are watching the episode Heating & Cooling System Controller; Re-Grout Tile Floor Plumbing and heating expert Richard Trethewey helps a California homeowner install a new type of "zoning" control for her forced-air heating and cooling system. Then Richard, along with landscaping contractor Roger Cook, host Kevin O'Connor and general contractor Tom Silva ask, "What is it?" Next, Tom helps a homeowner re-grout the tile floor in her master bathroom.